8211956: AppCDS crashes for some uses with JRuby
Summary: Make sure FileMapInfo::verify_mapped_heap_regions only verifies 'num' of spaces.
Reviewed-by: iklam
--- a/src/hotspot/share/memory/filemap.cpp Mon Oct 15 11:36:20 2018 -0700
+++ b/src/hotspot/share/memory/filemap.cpp Mon Oct 15 15:21:54 2018 -0400
@@ -1088,8 +1088,8 @@
}
bool FileMapInfo::verify_mapped_heap_regions(int first, int num) {
- for (int i = first;
- i <= first + num; i++) {
+ assert(num > 0, "sanity");
+ for (int i = first; i < first + num; i++) {
if (!verify_region_checksum(i)) {
return false;
}